Which of the following statements best explains why a closedballoon filled with helium gas rises in air?(a) Helium is a monatomic gas, whereas nearly all the moleculesthat make up air, such as nitrogen and oxygen, arediatomic.(b) The average speed of helium atoms is greater than theaverage speed of air molecules, and the greater speedof collisions with the balloon walls propels the balloonupward.(c) Because the helium atoms are of lower mass than the averageair molecule, the helium gas is less dense than air.The mass of the balloon is thus less than the mass of theair displaced by its volume.(d) Because helium has a lower molar mass than the averageair molecule, the helium atoms are in faster motion. Thismeans that the temperature of the helium is greater thanthe air temperature. Hot gases tend to rise.

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A: The gaseous samples given at STP are N2, Ar, CH4, and CO2.

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A: The given total pressure (P) = 764 torr   Partial pressure is the pressure or vapor pressure exerted…

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Q: Gas Y effuses half as fast as O2. What is the molar mass of gas Y?

A: rate of effuses is inversely proportional to the square root of the molar mass of gas.

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Q: When gasses are collected by water displacement, there is always water vapor (gaseous water)…

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Q: what quantity of moles of chlorine gas at 120.0 C abs 33.3 atm would occupy a vessel of 40.5L?

A:

Kinetic-Theory of Gases

Kinetic theory of gases is the model or method which was developed in the 19th century by Maxwell and Boltzmann. This is possible as the interatomic force which is of short-range forces that are important for solids and liquids can be neglected for gases. This theory or gas law gives a molecular interpretation of the pressure and temperature of a gas and is consistent with gas laws and Avogadro’s hypothesis. This theory is very helpful to correctly explain the specific heat capacities of many gases, kinetic energy and it also explains the transport qualities such as viscosity, thermal conductivity, and diffusion with molecular parameters. As stated in the kinetic-molecular theory, the temperature of a substance or gas particle is related to the average kinetic energy of the particles of that substance. When a substance is heated, some of the absorbed energy is stored within the particles, while some of the energy increases the motion of the particles, called average kinetic energy.